How to Sync Your iPod with Your iTunes Library
Click the Summary tab to see the Summary page, if it is not already selected.
The Summary tab displays the Summary page of sync options, and shows how much space on the device is occupied by content and how much is still free. You can also scroll the Summary page to change sync options in the Backup and Options sections.
If you haven’t made any sync selections, the default is to copy everything in your iTunes library that your iPod model can play. An iPod touch can play everything including apps, and show photos and videos from your photo library. An iPod classic can play everything but apps, and show photos and videos.
An iPod nano can play music, music videos, audio books, iTunes U courses, and audio podcasts; it can also show photos. An iPod shuffle can play music, audio books, iTunes U courses, and audio podcasts.
After changing a sync option, the Revert and Apply buttons appear in the lower-right corner of the sync pages. Click Apply to apply your sync option change or click Revert to revert back to the previous sync option setting. (If there are no changes to sync options, the Sync button appears in their place — click Sync to start syncing if syncing hasn’t already started.)
Even while syncing is going on, you can select or deselect content to sync and click Apply or Revert.